we'll have that story coming up. join us for those at 6:00. thanks for watching us at 5:00. the >> pelley: 170 b >> pelley: 170 bikers are arrested after the deadly shoot- out in waco. some could be charged with capital murder. also tonight, the f.b.i. determines whether the derailed amtrak train was hit by gunfire. luck runs out for two daredevils in what could be the most dangerous sport in the world and two sisters make a startling discovery that has changed their lives. >> the lightbulb went off and i had this big ah-ha oprah-style moment. captioning sponsored by cbs this is the "cbs evening news" with scott pelley. >> pelley: this is our western edition. this evening nearly 200 people are being held on murder-related charges. police provided the transportation for motorcycle gang members rounded up after

yesterday's deadly shoot-out in waco, texas. some of them could face capital murder charges. the police are armed and ready for any kind of retaliation that may come in this war between rival gangs. vicente arenas is in waco. >> reporter: police escorted bus loads of bikers to court today to face charges in yesterday's deadly shoot-out. heavily armed officers remained outside the twin peaks restaurant looking for evidence around the motorcycles left at the scene. police say bullets began flying between biker gang members inside after a restroom scuffle broke out. customers scrambled for cover. >> it was really, really scary. we didn't know if somebody was going to come back. >> reporter: as the shooting spilled out to the parking lot 22 officers who had been monitoring the gathering arrived and also shot at the suspects. nine bikers were killed and 18 others were seriously injured, either shot or stabbed.

waco police sergeant patrick swanton. >> there were at least three dead individuals in the immediate parking lot directly behind us. it's my understanding another four were around the front of twin peaks and then an additional victim had been drug over behind the other restaurant behind us. >> reporter: no officers or customers were hurt. 170 bikers are being held, each on $1 million bail, charged with organized crime linked to capital murder. two of the five biker gangs involved are all well-known tor federal authorities, mainly for trafficking meth, cocaine and marijuana. the cossacks are based in texas and are said to be affiliated with the hells angels, the largest biker gang in the country. the bandidos are the second largest with nearly 3,000 members in a dozen countries. >> it's about territory. it's about colors. it's about money. it's about hate. it's about violence. >> reporter: jay dobyns is a former bureau of alcohol

tobacco & firearms agent. he spent nearly 30 years undercover infiltrating biker gangs. >> if you're familiar with how these guys think, their tools of the trade, which are guns and knives and pipes and chains, and their hatred for each other, there was nothing shocking about it. it just happened to take place on a large scale in a public venue. >> reporter: it's still not clear whether it was other bikers or officers who killed the nine who died. the restaurant has been ordered to stop serving alcohol for seven days and, scott, today the twin peaks corporation severed its ties with the restaurant and pulled its name from the franchise. >> pelley: and police say they recovered 100 weapons at the scene. vicente arenas reporting for us tonight. vicente, thank you. the gun violence this weekend went well beyond waco. in chicago the police reported at least 38 people were shot between friday and last night. one of them died. the city has been plagued by gun violence, much of it gang related. today president obama put limits

on the heavy weaponry that the federal government has been making available to local police departments. we have more on this now from our chief white house correspondent, major garrett. >> reporter: these scenes of police dressed for battle in ferguson, missouri, last summer provoked a national debate on the militarization of local police. this was president obama in august. >> there is a big difference between our military and our local law enforcement, and we don't want those lines blurred. >> reporter: today in camden new jersey, the president took steps to clarify those lines issuing an executive order banning the pentagon and other federal agencies from sendingcies police departments surplus military hardware, like tank- treaded personnel carriers grenade launchers and even bayonets. the pentagon shipped more than 6,500 bayonets to civilian law enforcement agencies over the last two years, and the defense department says since 1991 police departments nationwide have received 175 grenade

launchers and 101 personnel carriers with tank-like treads instead of wheels. >> we've seen how militarized gear can sometimes give people the feeling like there's an occupying force as opposed to a force that's part of the community that's protecting them and serving them. >> reporter: but most military surplus items will continue flowing, like these mine- resistant personnel carriers used by police in the recent unrest in baltimore. police can still receive riot shields, long-range firearms or night vision goggles. there are new rules. law enforcement agencies requesting surplus gear will now have to announce their request publicly, explain how it will train its officers to use the military-style equipment and comply with measures to track it. in addition to these transparency moves, 21 cities have pledged to do more. publicizing for the first time precise numbers on officer- involved shootings and traffic stops.

scott, the president said this information will increase public awareness of police tactics and their consequences. >> pelley: major garrett tonight, major, thank you. there is an investigation this evening into what brought down a u.s. marine aircraft in hawaii. the mp23 osprey crashed and caught fire yesterday during training exercises. one marine was killed. four others are in the hospital. the osprey is a tiltrotor aircraft. it takes off and lands like a helicopter but flies like a plane. it has been used extensively in iraq and afghanistan. iraq's u.s.-trained military suffered a serious defeat yesterday. it was chased out of the city of ramadi by the islamic militant group known as isis. the u.n. says 25,000 civilians are fleeing the city now. ramadi is a city of 500,000, 70 miles west of baghdad. it is the capital of a province that was once secured at the

cost of 1,300 american lives. clarissa ward is following this. >> reporter: it is the biggest military victory for isis since last summer when the militant group swept iraq's second largest city of mosul. after four days of intense fighting, iraqi authorities said that 500 people were left dead thousands of civilians fled as the black flag of isis was raised over ramadi. the fall of ramadi came in spite of intensified u.s. efforts to push back islamic state fighters with at least 180 air strikes on the city in the last month. as isis militants flooded in iraqi security forces appeared to flee. policemen abandoned their stations, leaving behind their american-supplied weapons and equipment. ramadi is the largest city in the mainly sunni province of anbar, which stretches from the western edge of baghdad to syria

and jordan. anbar was the heart of the insurgency against u.s. forces during the iraq war. nearly 1,300 u.s. marines and soldiers were killed there. last month iraq's prime minister promised a sweeping new military offensive in anbar to rout out isis militants, but with the retreat of the iraqi army, there are few appealing options. now the iraqi government has mobilized its shiite militias, some supported by iran to try and reverse its losses. it is a controversial move. many fear the presence of shia paramilitary forces will reignite a religious war with sunni residents and tribes in anbar. >> pelley: and clarissa is joining us now. clarissa, quick question: the u.s. government has said in the past that it will not provide air support if these shia militias controlled by iran are in the fight. so where does this leave the u.s. now?

>> reporter: well, scott, the u.s. is in an awkward position here, as you pointed out during the battle for tikrit, the u.s. military initially sat out saying it wouldn't participate while those militias were operating on the ground, but today they appear to be walking back from that position, saying the shiite militias do have a role to play as long as they are operating under the control of the iraqi government. >> pelley: that's an indication of how difficult things have become. clarissa ward reporting for us in beirut. clarissa, thank you. there is a humanitarian crisis off the coast of malaysia this evening. thousands of migrants are stranded at sea. many are muslims who fled religious persecution in burma. some have made it to shore, but at least 5,000 have been adrift for weeks on rickety boats like these, with little food or water. three nations, thailand, malaysia and indonesia have refused to take them in.

today amtrak restored service on the busiest rail corridor in america. six days after the wreck in philadelphia that killed eight passengers, the train derailed as it took a curve at 106 miles- per-hour. more than twice the speed limit. kris van cleave is on the investigation. >> reporter: f.b.i. forensic experts finished examining the windshield of the derailed amtrak train's engine today and found no signs the damage came from a firearm. investigators are now trying to determine if the damage came from a rock or another projectile. the n.t.s.b.'s robert sumwalt. >> i've seen the fracture pattern. it looks like something about the size of a grapefruit, if you will, and it did not even penetrate the entire windshield. >> reporter: an assistant conductor on train 188 told investigators she remembered a radio conversation between engineer brandon bostian and a regional train operator about their trains being struck by objects, but the engineer of the regional train hit by a

projectile shortly before the crash spoke with the n.t.s.b. over the weekend and did not recall any such conversation and there was no communication from bostian reporting any impact. philadelphia's regional transit authority says it receives two or three reports a month of objects being thrown at trains. even with the looming question of what caused tuesday's derailment, amtrak is back in service in philadelphia. we're on the very first amtrak train to start running after the deadly derailment, crossing over the newly replaced tracks. the train slowed noticeably as we went around the curve where the derailment happened. passenger bryan cummings was on that early morning train bound for new york city without any hesitation. >> one of the safest ways to travel, and, you know, this is the way i want to go. >> reporter: federal regulators required amtrak to activate safety technology at the scene

of the derailment that would stop a speeding train before it got to that curve and amtrak is also adding speed limit signs as well as reviewing the posted speed limit for curves throughout their system. >> pelley: the safety board said today the investigation could take 12 months. kris van cleave reporting for us tonight. kris, thanks very much. today we learned of the new blood test to diagnose a very common intestinal illness known as i.b.s. dr. jon lapook is here to tell us more. john, you're a gastroenterologist. tell us about i.b.s. and why this test really matters. >> well, i.b.s. is a chronic condition characterized by abdominal bloating, discomfort diahrrea and/or constipation. it's enormously frustrating for up to the 40 million americans that have it because up until now there has been no test for it. so patients often go from doctor to doctor to rule out other conditions. when everything comes back negative, they say, well, it must be ibs.

now there's a new blood test that can help make the diagnosis. >> pelley: how does the new test work? >> it's based on research after many years by dr. mark pimen tell and his colleagues at cedars-sinai in l.a. says it may develop after a bacterial toxin found in food poisoning. it resembles a vital protein found in the gut. the immune system may confuse the two and antibodies continue to attack the intestinal track long after the toxin is gone. >> the test shows whether that is occurring? >> the test for these two antibodies. what's so important is that not only for all the millions of americans with ibs, they can say it's not in my head, it's showing something in the blood but it suggests a possible mechanism. now that we have a blue, maybe we can come up with better treatments. >> pelley: 40 million americans. john, thank you very much. a tragic accident takes the life of an extreme athlete known for pushing boundaries.

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>> three, two, one... >> reporter: this is dean potter base jumping in a wing suit last year, his dog whisper strapped on his back. on saturday potter and fellow flyer john hunt jumped off taft point in yosemite. base jumping is illegal in yosemite and five people have died doing it. 43-year-old potter was considered one of the best rock climbers of his generation. this national geographic documentary shows how he also mastered extreme wire walking known as high-lining and flew it more than 100 miles-per-hour in his wing suit. >> this is game where the odds are not in your favor. >> reporter: corey rich knew potter for more than 20 years. he was there when potter set the record for longest wingsuit flight by a human being. >> he had a grasp of the ultimate consequences, but he could block that out and channel

his focus into pushing the limit and going where no human had ever gone before. >> ready, set, go. >> reporter: wingsuit flying is arguably the most dangerous sport in the world. in 2009, "60 minutes" gathered some of the best flyers, including j.t. holmes, who knew dean potter. >> if you do crash in your wingsuit, you're going to die. nobody lives through that. you're just going too fast. >> reporter: in an interview showed on "outside television" last year potter said as a kid he dreamed about flying and falling. >> i always wondered as i got older if i was... if it was some premonition of me falling to my death. >> reporter: potter says he overcame that fear by climbing into the face of it and jumping into the unknown. ben tracy, cbs news, los angeles. >> pelley: no sitting president has done what this sitting president did today. we'll have the story coming up.

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>> pelle >> pelley: a lot of fans are asking why so many cars have crashed during practice for next sunday's indy 500. today james hinchcliffe hit a wall and spun around. he was rushed to the hospital and had surgery on his left thigh. that makes five crashes in the last week. in most, the car went airborne. the car designs were tweaked before this season to increase speed, but yesterday the race organizers ordered the teams to cut the power slightly.

as we turn the corner into summer driving season, gas prices have risen 32 cents in the past 34 days to a nationwide average tonight of $2.71 a gallon. but that is still nearly $1 less than last memorial day. president obama test drove his own personal twitter account today. in his first tweet, he wrote "hello, twitter. it's barack. really. six years in, they're finally giving me my own account. it's called potus, which is the acronym for president of the united states, and he already has well over a million followers, including former potus bill clinton, who wondered, "does that user name stay with the office #asking for a friend." two writers who had never met have a story that begins and ends exactly the same way. that story next.

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>> pelley: this was commencement day at columbia university in new york, and among the graduates, two aspiring writers with one incredible story. as told tonight by anna werner. >> lizzie valverde, bachelor of arts. >> reporter: lizzie valverde's graduation from columbia university marked the end of years of study and the beginning of a new family. >> hey, guys. >> congratulations. >> reporter: her mother and her sister joining her here together for the first time. >> you've never been to a family event together before, have you? >> no. >> nope. >> no, no. we never even all met until yesterday. >> reporter: that's because over 30 years ago leslie parker battling drug addiction after a troubled childhood, placed her two daughters up for adoption.

>> i was basically homeless when i was pregnant with both theseht girls, and as much as i loved them and wanted to keep them, i knew it would be extremely selfish and i could not offer them anything but love, but that's not enough to raise a child, it really isn't. >> reporter: so sisters lizzie valverde and katy olson grew up in separate adoptive families. valverde studied poetry. olson became a stand-up comic. it was in january 2013, both decided to go back the school and signed up for the same non- fiction writing class at columbia as perfect strangers. >> we were going around the tables, and lizzie said n something about being adopted. there were a couple details that all started to add up. the lightbulb went off. and i had this big ah-ha oprah- style moment. >> you're having this reaction. what are you thinking in. >> first thing i said was, "is this real life?"

>> reporter: valverde had previously found their mother and reunited the family just last night. >> there was a lot of pride, a lot of sorrow and a lot of happiness. >> why the sorrow? >> because i wasn't there to see them grow up. >> reporter: what did the two of you get back when you found your mom? >> we definitely got a sense there is a higher power. >> i got my fairy tale. it feels like a fairy tale. >> reporter: they both have degrees in creative writing and a tale of their own to tell, one that only sounds like fiction. anna werner, cbs news, new york. >> pelley: and happy ending. that's the "cbs evening news" for tonight. for all of us at cbs news, all around the world, good night. captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org

we have breaking news tonight. an all-out search for a mountain lion in this bay area neighborhood and moments ago reports of shots fired. >> kpix 5's betty joins us from san mateo. you just heard gunfire, is that right? >> i heard that gunshot loud and clear. we're getting unconfirmed reports that that shot may have come from a neighbor trying to scare this mountain lion away. we've not confirmed that at this time with san mateo pd. let me show you what's going on here. this is a very residential neighborhood. we're on palm avenue and hayward avenue. crime tape all around this block. a lot of curious onlookers trying to see if they

can catch this mountain lion. this is not typical for this area. this follows two sightings in one day of a mountain lion. the first one came in at 4:30 this morning. officers responded to the area of avila and el camino real. one saw a 60 to 80-pound mountain lion wandering the area. another resident reported seeing a large brown cat in the area of 9th avenue, and since then officers have been roaming this very residential area with rifles going through backyards looking for this mountain lion. at one point we heard that it was in a tree, but san mateo pd has not been able to confirm that sighting. so several hours later now still looking for this mountain lion. we're told they've told people in this immediate area to stay inside for the time being. we're also told